Muffler.



z SHEETS-SHEET 1',

P. HORNOUIST.

MUFPLEE. APPL'IOMION FILED JUNB15,1914.

Patented Feb. 9, 1915.

F. HORNQUIST. MUPFLER.

APPLICATION FILED JUNE 15,1Q14. @W/98%., Patented Feb.,9,1915.

2 SHEETS-SHEET 2.

y mmi Trank HomqlLS FRANK HOINQUIST, F MOUNT JEW'ETT, PENNSYLVANIA.

MUFFL'EB..

4TaZZ whom 'it may concern.'

Be it,known that I, FRANK HORNQ'UIST, a citizen of the AUnited States, residing at Mount Jewett, in thecounty of McKean and State of Pennsylvania, `have invented certain new and useful', Improvements in' Muliers; and .I do' declare the following to and use thesamex.

be aulhclear, and exactgdescription ofthe invention, such 'as will enable others skilled y in theartto `which it appertans to make This invention relates to. improvements in '.silenjcers being more' especially directed to a muier designed for use .withengines 1n Vwhichlthe energy of exhaust gases is .dissipated` bycounteracting their velocity' of' movementan'dlclianging theirl path of direction within the silencer.

rPhe principal object ofthe invention' is to.

providea muller which will draw in there; 'haustjin'd cause it .to'spread tothe outer I edges of-.the muiiler andwhich is so con structed'that the dead air is ,given a chance to escape at the outletl and simultaneously produce suction from the engine thereby v:tacilitating the work of the engine Iand keeping theair channels of the inlet empty ready-to take care of the gas exhaust` Another object ofthe invention is -to pro- 'vide aspiral muiler constructed in one piece ',and having'means for preventingthe exhaust'froin pressing the spirals'toge'ther.

With these and other objects in View,v the i invention consists of certain'novelfe/atures .of construction and the combination andarrangement of parts as will be morev fully described and claimed.

vIn the accompanying drawings: Figure 1 4represents a -longitudinal section through the muflier casing with the muitling elements 'shown inside' elevation: Fig. 2 is a central longitudinal'section taken on' line 2 2 of Fig. 1: F.ig, 3 is a transverse section taken on lline of Fig.4 1: Fig. 4 1s asimilar View taken on line 4 1 of Fig. 1: Fig. l5 1s a. central longitudinal section of another form of the invention: Fig. 6. is a transversesection taken online 6 6 of Fig. 5: Fig. 7 is a similar view taken on line 7 7 of Fig. 5: Fig. 8 is a detail longitudinal section of still'another form.

ln the embodiment illustrated in Figs. l to 4 a cylindricalfc'asing 1 is shown which may be of any desired construction and which-'is provided at its' opposite ends with 4heads Q and 3 each preferably in the form ,Specicationof Letters Patent.

Application led June 15,

Patentedreb. a, 1915.`

1914. serial No. 45,284; v

of a diskhaving a central apertured boss 4- annular skirt 9 Vpositioned substantially at rightanglesfto the base4 of themember to I formfa reinforcing. exhaust resisting ele -inenti'or preventing the exhaust from forcing the members 7 ltogether whichwould tend to closepr reduce the space between the members and prevent the passage of the exhaust gases between them. By this spiral aprangement of the mutllingjelements 7 the r'exhaust is drawnin at the inlet nozzle and caused to spread -to'the outer edges of the spiral coil and the continuous form of said coil produces an open air chamber in the Vspirals extending from one end of the muiier to the other thereby providing an escape thedead air at the outlet and at the saine time producing a suction trom the engine. 'This suction from the engine assists it inv its Work and at the same time tends to keepthe air chambers of the inlet empty ready to take care'of the next exhaust thus making the .exhaust silent.

By constructing this muier iIr the form of a continuous-spiral coil the sound or report of the exhaust'vvill be silenced even although the opening clear through the muiler is larger than the'exhaust pipe on the engine as the c oil will produce a suction -on the exhaust and adapt the engine to work with less fuel than is necessary when such mutlier is not employed.

The spiral coil may be so .constructed'that the skirts of the mufliing elements can be secured to the'bases of the cone shaped portion of the elements in 'such a manner as to produce a smooth outsideface and the disks or heads 2 and 3 for connection with the inl let and outlet pipes may he riveted or otherwise secured to the endsof the spiral thereby providing for the construction of the mutller from three parts only. i

In the form shown in Figs. 5 to 7 the muiiler casing 1 is shown rectangular in cross section instead of cylindrical as shown in the other iigures andthe mufiiing elements 7 may be constructed from a single piece of sheet iron as shown in Fig. or may be in separate sections as shown 1n Fig. 8 as may be desired.

In practice the disposition of the breakers 5 7 is such that the exhaust under pressure leaving'the engine enters through the inlet pipe 5 and first encounters lone of the spirally formed breakers. The gases are diffused thereby and pass through the aperture in saidbreaker into the space between the same and the breaker 7 next beyond andare deflected by the sides of the casing l and caused to findtheir way through the central.

opening' of the next breaker kand so on through the silencer., the flow of said exhaust,

being continuous in one direction but tortuous as indicated by the arrow in Fig. 2` whereby 'its velocity is broken and its.course changed. The spiral arrangement of the l muiiiingelements produces va somewhat practically moving under their expansive" force alone which'Leectively deadens all sound and causes the exhaust gases' to pass into the atmosphere without 4making any l noise. It is of course to be understood that any desired number of breakers may be used mareas and that the sizes may be varied, with rela, tion to each other, to any desired extent.

I claim asvmy invention l. A silencer composed of a plurality of vspirally arranged frusto-conical muiiiing 40 elements constructed from asinglestrip of metal.` y

2. A silencer composed of a plurality of spirally arranged frusto-conical 'mufliing elements each' having a depending annular 45 skirt and 'constructed from a single strip of metal.

3. `A.' silencer bomposed of a plurality of .Connected spirally arranged frusto-conical mulingelements, and means for ApreX-'enting 5o said elements from being pressed together. .4. A silencer 'composedof aplurality of "spirally arranged frusto-conical 1 muiing elements formed of a continuous strip.

5. A. silencer composed of'a plurality of. 55

`spirally "arrangedmufing elements. said elements being angular in lcross section.

6` A silencer comprising an mclosing casing providedat its oppos1teends with an inlet and outlet respectively, and a plurality 60 l of spirally arranged muiliing elements disposed therein and formed of a single piece, of metal., I i y In testimony whereof I have hereunto set 'my hand inpresence of two subscribing wit- 65 nesses.

FRANK HORNQUIST. Witnesses: l

SEXTUS LUNDBERG,

O'rro PnARsoN. 

